MinXSS (Miniature X-ray Solar Spectrometer) is a 3U CubeSat solar physics mission of the CU (University of Colorado) at Boulder, designed to better understand the energy distribution of solar flare SXR (Soft X-ray) emissions and its impact on the Earth’s ITM (Ionosphere, Thermosphere, and Mesosphere). The Amptek X-123SDD was chosen as an integral component of this project. The MinXSS-1 is currently in orbit with the X-123SDD performing solar SXR spectral measurements in the 0.5-30 keV range (0.04-2.5 nm) with 0.15 keV energy resolution. The MinXSS-2 is scheduled for launch in the Fall of 2016.
Please see https://eoportal.org/web/eoportal/satellite-missions/content/-/article/minxss for further information.